Wait, but Fastmail does have family plan, introduced 2 years ago. Just letting you know :)
33 karma · joined October 1, 2015
[1] https://tomorrowcorporation.com/posts/how-we-make-games-at-t...
I would love to have such tech nowadays, but focused on 2D/light-3D mobile games :)
Being too pro-consumer on the other hand... well, that gives you mobile gaming with heavy focus on free-to-play and plenty of ads.
Be careful what you wish for :)
I'm not sure if that's the kind of open source you were looking for, but may be worth checking out.